{
  "node": {
    "id": "term:tab",
    "type": "Term",
    "label": "Tab",
    "properties": {
      "id": "tab",
      "name": "Tab",
      "section": "topic-components",
      "definition": "The strip of metal that connects an electrode’s foil to the cell terminal: nickel or copper on the negative side, aluminium on the positive. Tab count and width set much of a cell’s resistance and heat generation.",
      "related": [
        "current-collector",
        "tab-welding",
        "tabless-design",
        "terminal"
      ],
      "example": {
        "title": "Electrical and thermal paths",
        "text": "Tab geometry can change electrical resistance and heat flow without changing active-material capacity."
      },
      "url": "https://lemonergy.com/learn/glossary/tab/",
      "mentions": [
        "electrode",
        "heat-generation"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:469",
      "source": "term:tab",
      "target": "topic:topic-components",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:470",
      "source": "term:tab",
      "target": "term:current-collector",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:471",
      "source": "term:tab",
      "target": "term:tab-welding",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:472",
      "source": "term:tab",
      "target": "term:tabless-design",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:473",
      "source": "term:tab",
      "target": "term:terminal",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/tab/electrode",
      "source": "term:tab",
      "target": "term:electrode",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/tab/heat-generation",
      "source": "term:tab",
      "target": "term:heat-generation",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-components",
      "type": "Topic",
      "label": "Cell components and electrode materials",
      "properties": {
        "id": "topic-components",
        "name": "Cell components and electrode materials",
        "lede": "What a cell is physically made of — active materials, binders, additives, foils and tabs — and how its electrodes are put together.",
        "context": "Connect each material with its function.",
        "example": "Electrons travel through additive, foil and tab; ions use electrolyte and separator pathways.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-anatomy/",
        "lesson_label": "Open cell anatomy"
      }
    },
    {
      "id": "term:current-collector",
      "type": "Term",
      "label": "Current collector",
      "properties": {
        "id": "current-collector",
        "name": "Current collector",
        "section": "topic-components",
        "definition": "The thin metal foil that carries electrons between an electrode and the external circuit — usually copper on the negative side and aluminium on the positive side.",
        "related": [
          "copper-foil",
          "aluminium-foil",
          "tab",
          "electronic-path"
        ],
        "lesson": "fundamentals/cell-anatomy/#components",
        "example": {
          "title": "Follow current to a tab",
          "text": "Current converges through foil toward the tab. The collector contributes mass and resistance without being the principal active material."
        },
        "url": "https://lemonergy.com/learn/glossary/current-collector/",
        "mentions": [
          "electrode"
        ]
      }
    },
    {
      "id": "term:tab-welding",
      "type": "Term",
      "label": "Tab welding",
      "properties": {
        "id": "tab-welding",
        "name": "Tab welding",
        "section": "topic-manufacturing",
        "definition": "Joining the bundle of foil tabs to the terminal tab, usually by ultrasonic welding, which bonds thin foils without melting them; laser welding is used for can-to-cap and busbar joints. A weak weld raises resistance and can fail in service.",
        "related": [
          "tab",
          "ultrasonic-welding",
          "laser-welding",
          "internal-resistance",
          "tab-pull-test"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/tab-welding/",
        "mentions": [
          "busbar"
        ]
      }
    },
    {
      "id": "term:tabless-design",
      "type": "Term",
      "label": "Tabless design",
      "properties": {
        "id": "tabless-design",
        "name": "Tabless design",
        "aka": [
          "full-tab",
          "shingled tab"
        ],
        "section": "topic-chemistries",
        "definition": "A cylindrical-cell construction in which the whole uncoated edge of each foil is folded and welded to the end cap instead of one or two narrow tabs. The current path shortens from metres to millimetres, cutting resistance and heating in large-format cells.",
        "related": [
          "tab",
          "cylindrical-cell",
          "internal-resistance",
          "tab-welding"
        ],
        "url": "https://lemonergy.com/learn/glossary/tabless-design/",
        "mentions": []
      }
    },
    {
      "id": "term:terminal",
      "type": "Term",
      "label": "Terminal",
      "properties": {
        "id": "terminal",
        "name": "Terminal",
        "section": "topic-components",
        "definition": "The external conductor through which current enters and leaves the cell: the can and cap of a cylindrical cell, two posts on a prismatic cell, or the sealed foil tabs of a pouch cell.",
        "related": [
          "tab",
          "busbar",
          "voltage"
        ],
        "url": "https://lemonergy.com/learn/glossary/terminal/",
        "mentions": [
          "cylindrical-cell",
          "prismatic-cell",
          "pouch-cell"
        ]
      }
    },
    {
      "id": "term:electrode",
      "type": "Term",
      "label": "Electrode",
      "properties": {
        "id": "electrode",
        "name": "Electrode",
        "section": "topic-components",
        "definition": "A solid conductor where the cell’s reaction happens, in contact with the electrolyte. A lithium-ion cell has a negative electrode and a positive electrode, each a porous coating on a metal foil.",
        "related": [
          "negative-electrode",
          "positive-electrode",
          "porous-electrode",
          "current-collector"
        ],
        "lesson": "fundamentals/cell-anatomy/#components",
        "example": {
          "title": "Two transport paths",
          "text": "Electrons need connected solid paths to the collector; ions need electrolyte paths to reaction sites. More of one constituent displaces others at fixed volume."
        },
        "url": "https://lemonergy.com/learn/glossary/electrode/",
        "mentions": [
          "electrolyte",
          "coating"
        ]
      }
    },
    {
      "id": "term:heat-generation",
      "type": "Term",
      "label": "Heat generation",
      "properties": {
        "id": "heat-generation",
        "name": "Heat generation",
        "aka": [
          "Bernardi equation"
        ],
        "section": "topic-thermal",
        "definition": "The heat a cell produces in operation: an irreversible part equal to current times overpotential, and a reversible part from the entropy change, I·T·dE/dT. The Bernardi equation sums them and feeds every thermal model.",
        "formula": "q = I(V − E_OCV) + I·T·(dE/dT)",
        "unit": "W",
        "related": [
          "entropy-coefficient",
          "internal-resistance",
          "thermal-model",
          "thermal-management",
          "exothermic"
        ],
        "example": {
          "title": "Keep reversible and irreversible heat separate",
          "text": "With charging current +5 A and terminal voltage 0.10 V above OCV, the irreversible term is 0.50 W. At 300 K with dE/dT = +0.1 mV/K, the reversible contribution is +0.15 W, giving 0.65 W under this sign convention."
        },
        "url": "https://lemonergy.com/learn/glossary/heat-generation/",
        "mentions": [
          "overpotential"
        ]
      }
    }
  ]
}